US9259676B2 - Refillable filter system - Google Patents

Refillable filter system Download PDF

Info

Publication number
US9259676B2
US9259676B2 US13/140,064 US200913140064A US9259676B2 US 9259676 B2 US9259676 B2 US 9259676B2 US 200913140064 A US200913140064 A US 200913140064A US 9259676 B2 US9259676 B2 US 9259676B2
Authority
US
United States
Prior art keywords
annular
filter
filter cartridge
external housing
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US13/140,064
Other languages
English (en)
Other versions
US20110311400A1 (en
Inventor
Britton G. Billingsley
David M. Castiglione
Gary E. Dwyer
Pierre Legare
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to US13/140,064 priority Critical patent/US9259676B2/en
Assigned to 3M INNOVATIVE PROPERTIES COMPANY reassignment 3M INNOVATIVE PROPERTIES COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEGARE, PIERRE, DWYER, GARY E., BILLINGSLEY, BRITTON G., CASTIGLIONE, DAVID M.
Publication of US20110311400A1 publication Critical patent/US20110311400A1/en
Application granted granted Critical
Publication of US9259676B2 publication Critical patent/US9259676B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B01D46/0024—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially

Definitions

  • the present disclosure pertains to radial flow filtration systems, which may be used as collective protection filters in ventilation systems. More particularly, the present disclosure pertains to radial flow filtration systems including at least one removable filter section.
  • Air handling systems are commonly fitted with filters that remove chemical and particulate hazards from the air supply. Such systems can be used in a variety of situations including protection within buildings and on mobile locations such as ships.
  • Filters commonly used for collective protection air handling systems are often cylindrically shaped and have an inlet at the inner surface of the filter housing. The outlet of such filters is typically located at the outermost periphery of the filter.
  • Such filters typically have a pleated particulate filter section intended to target particulate contaminants that is disposed near the inlet of the filter. They also often have a chemical filter bed that targets gases.
  • Known filter beds include packed filter beds, and bonded particle masses. Filter beds may include multiple layers.
  • the chemical and particulate filter elements within the filter system may be contained as layers in a single filter element or deployed as separate filter elements.
  • the present application is directed to a radial flow filtration system comprising a housing having an interior, an inlet and an outlet.
  • a generally cylindrical filter cartridge is disposed in the interior of the housing.
  • the filter cartridge comprising a cartridge shell and a filter section disposed within the cartridge shell.
  • the filter cartridge is removable with respect to the housing, and the filter section is removable with respect to the cartridge shell.
  • a particulate filter section is also disposed in the interior of the housing.
  • the present application is directed to a radial flow filtration system comprising a housing having an interior, an inlet and an outlet.
  • a first generally cylindrical filter cartridge is disposed in the interior of the housing.
  • the first filter cartridge comprises a first cartridge shell and a first filter section disposed within the first cartridge shell.
  • a second generally cylindrical filter cartridge is disposed in the interior of the housing.
  • the second filter cartridge comprising a second cartridge shell and a second filter section disposed within the second cartridge shell. At least one of the first and second cartridges is removable with respect to the housing, and the filter section of that cartridge is removable with respect to that cartridge shell.
  • FIG. 1 shows schematically an exemplary radial flow filtration system including two filter sections.
  • FIG. 2 shows schematically a section view of one exemplary filter cartridge.
  • FIG. 3 shows schematically an exploded view of one exemplary filter cartridge shell.
  • FIG. 4 shows schematically an exploded assembly view of an exemplary radial flow filtration system including five filter sections.
  • FIG. 5 shows schematically a section view of an exemplary radial flow filtration system including five filter sections.
  • FIG. 6 shows schematically an exemplary air handling system including a radial flow filtration system according to the present disclosure.
  • Typical exemplary embodiments of the present disclosure include radial flow filter systems including at least one filter cartridge that is removable with respect to the housing.
  • An exemplary filter cartridge includes a cartridge shell and a filter section. The filter section of the exemplary cartridge is removable with respect to the cartridge shell.
  • the removability of the cartridge with respect to the housing and of the filter section with respect to the cartridge shell allow the user to replace the spent filter section without disposing of the entire housing or the entire filter cartridge.
  • Exemplary embodiments of the present disclosure may help reduce long term maintenance expense and waste by allowing the housing and cartridge shell to be provided with fresh filter sections.
  • An exemplary radial flow filtration system 100 shown in FIG. 1 includes a housing 110 having an interior 112 wherein two generally cylindrical filter cartridges 120 , 130 are disposed in the interior 112 of the housing 110 .
  • the housing 110 includes walls 150 disposed at the inner and outer edges of the generally cylindrically filtration system 100 .
  • the walls 150 could include an inner screen and an outer screen, which may be used to enclose and protect the elements disposed in the interior 112 of the housing 110 , for example, during shipping and handling.
  • Walls 150 can be made of perforated metal such as aluminum or steel or engineered plastics. Openings in the metal can be, for example, round with a diameter of one-eighth or three-sixteenths of an inch or more or less.
  • the housing 110 may also include caps 160 on one or both ends of the filter system 100 which unitize the various filter cartridges 120 , 130 into a single filter system 100 .
  • the caps 160 may be constructed of metal such as aluminum or steel or engineered plastics.
  • the caps 160 may be substantially flat and disk-shaped with a hole in the center.
  • the diameter of the cap 160 is substantially the same as the diameter of the outer screen and the diameter of the hole in the center of the cap 160 is substantially the same as the diameter of the inner screen.
  • the diameter of the cap 160 may be larger or smaller than the diameter of the outer screen and the diameter of the hole in the center of the cap may be larger or smaller than the diameter of the inner screen.
  • the filter housing 110 or the caps 160 may have any other suitable configuration.
  • the caps 160 may also feature multiple protrusions or depressions.
  • the protrusions may include rims at the inner and/or outer edges of the caps 160 .
  • Additional protrusions or depressions may be provided at varying diameters on the caps to engage gaskets 170 which seal the ends of the filter cartridges 120 , 130 to the end caps 160 .
  • the caps 160 may have depressions in them to permit the passage of vertical bolts 161 securing holding end caps 160 to filter cartridges 120 , 130 .
  • horizontal bolts 162 support a flush mounting of walls of filter cartridge shells 122 , 132 to filter cartridge covers.
  • the inlet 114 of the housing 110 may be located at the inner periphery of the housing 110 .
  • the outlet 116 which is in fluid communication with the inlet 114 , may be located at the outer periphery of the housing 110 .
  • the filter system 100 when the filter system 100 is placed in an air handling system 600 shown in FIG. 6 , the air is routed to the inlet 114 located in the inner circumference of the housing 110 . The air then may pass through each of the filter cartridges beginning with the cartridge disposed nearest the inlet 114 until it passes through the outlet 116 .
  • the present disclosure may also be used in other fluid handling systems, and embodiments of the present disclosure may have different configurations and locations of the inlet 114 and outlet 116 .
  • FIG. 2 illustrates a cross section of an exemplary filter cartridge 200 .
  • a filter cartridge 200 includes a cartridge shell 210 and a filter section 220 .
  • the cartridge shell 210 may include a generally cylindrical permeable inner wall 212 and a generally cylindrical permeable outer wall 214 .
  • the walls 212 , 214 may be made of any suitable materials such as perforated metal sheets, such as steel or aluminum sheets, or engineered plastics.
  • the diameters of the inner wall 212 and the outer wall 214 are dependent upon the composition and size of the filter section 220 , the disposition of the filter cartridge 200 within the housing 110 , the number of cartridges 200 disposed in the housing 110 , industry standards for existing air handling systems and other relevant considerations.
  • the distance between an inner wall 212 and outer wall 214 may be about 5 centimeters.
  • dimensions of cartridge walls 212 , 214 can vary significantly based on the factors discussed above.
  • a cartridge shell 210 may also include one or two covers 218 , which in some embodiments may be generally disk shaped or ring shaped with an opening in the center of the cover 218 .
  • the diameter of cover 218 may be similar to or slightly larger or smaller than the diameter of the outer wall 214 , and the diameter of the opening in the center of the cover 218 may be similar to or slightly larger or smaller than the diameter of the inner wall 212 .
  • a cartridge cover 218 may include impermeable material, such as engineered plastic, or metal, such as aluminum or steel.
  • a cartridge cover 218 can be generally perpendicular to walls 212 , 214 when the cartridge is assembled.
  • a cartridge cover 218 may fit primarily within the walls 212 , 214 with an outer lip 218 a extending so as to mate with the walls 212 , 214 .
  • the diameter of a cover 218 may be larger or smaller than the diameter of the outer wall 214
  • the diameter of the opening in the center of the cover may be larger or smaller than the diameter of the inner wall 212 .
  • the walls 212 , 214 can then be secured to the cartridge cover by screws 262 passing through the walls 212 , 214 , preferably generally perpendicularly to the walls, and into the width of the cartridge cover 218 .
  • a cartridge cover 218 may also include a groove 219 by which to engage a gasket 270 to provide a seal between a cartridge cover 218 and an end cap 160 .
  • a filter section 220 contained within the filter shell 210 may include either a chemical or particulate filter section 200 , or both.
  • the filter section 220 may include a packed filter bed, a particle loaded web, a bonded particle mass or other types of chemical filter elements.
  • the filter section 220 may include a chemical filtering medium, such as a filter bed, which may include a packed filter bed and a compression pad 230 .
  • the filter section 220 may include bonded carbons such as those discussed in U.S. Pat. No. 6,391,429, or, for example, non-woven webs including polymeric fibers and carbon particles enmeshed in the fibers.
  • the packed bed may be loaded by any suitable method, such as a storm filling method where particles are poured down a tube with cross-wires located to ensure that the carbon falls evenly and packs into the container to as high a packing density as practical.
  • the filter bed may, for example, include sorbent particles and/or catalysts.
  • Exemplary chemical filtering media may include any one or more of activated carbon, alumina, zeolite, silica, catalyst supports and the like.
  • Examples of compounds or substances that can be used in the chemical filtering medium according to the present disclosure include zinc chloride (ZnCl 2 ) treated carbon which removes ammonia (NH 3 ) and organic vapors (OVs); an exemplary activated carbon, impregnated with copper, silver, zinc, molybdenum, and triethlyenediamine (TEDA).
  • ZnCl 2 zinc chloride
  • NH 3 ammonia
  • OVs organic vapors
  • an exemplary activated carbon impregnated with copper, silver, zinc, molybdenum, and triethlyenediamine
  • Suitable particles also include activated carbons, such as multigas activated carbons including one or more of copper, zinc, molybdenum, sulfuric acid and a salt thereof, such as carbons available form Calgon Carbon Corporation, and particularly, an activated carbon type such as Universal Respirator Carbon (URC), which includes copper and zinc in a total amount of not more than 20%, molybdenum compounds of up to 10%, sulfuric acid or a salt thereof of up to 10%, and can remove acid gases (such as SO 2 , H 2 S), basic gases (such as NH 3 ), hydrogen cyanide and organic vapors (such as CCl 4 , toluene, most hydrocarbons).
  • activated carbons such as multigas activated carbons including one or more of copper, zinc, molybdenum, sulfuric acid and a salt thereof, such as carbons available form Calgon Carbon Corporation, and particularly, an activated carbon type such as Universal Respirator Carbon (URC), which includes copper and zinc in a total amount of not more than 20%, molyb
  • Pat. No. 5,344,626 which can remove acid gases, hydrogen cyanide, and organic vapors; an untreated carbon such as a coconut based, acid washed carbon without additional chemistries which, can remove organic vapors; or a zeolite.
  • mesh size for sorbent particles can be about 20 ⁇ 40 where ‘20’ refers to a mesh density through which substantially all of the particles would fall through and ‘40’ refers to a mesh density that is sufficiently high so as to retain substantially all of the particles.
  • a mesh size of 20 ⁇ 40 means that substantially all of the particles would fall through a mesh having a mesh density of 20 wires per inch and substantially all of the particles would be retained by a mesh density having a density of 40 wires per inch.
  • Selecting an appropriate mesh size requires balancing density and filter capacity against air flow resistance. Generally a finer mesh size provides greater density and filter capacity, but also higher airflow resistance.
  • mesh sizes found to be suitable in the present disclosure include, but are not limited to, 12 ⁇ 20, 12 ⁇ 30, 12 ⁇ 40 and 20 ⁇ 40.
  • a compression pad 230 can placed on top of the particles between the inner and outer walls 212 , 214 to maintain even distribution of particles.
  • a chemical filter section 220 may include a particle loaded web.
  • the web can be made according to the process described in United States Published Application No. 2006/0096911 A1, incorporated herein by reference.
  • the same chemical filtering particles that can be used in the packed bed can be used in a loaded web, though the particles may have a different mesh size.
  • the mesh size for sorbent particles enmeshed in a web can be about 40 ⁇ 140.
  • the web may be pleated. Taking these factors into consideration, a web, for example, may include sorbent particles with a mesh size including about 12 ⁇ 20 to about 80 ⁇ 325.
  • an exemplary filter section such as filter sections 124 , 134 enclosed in filter cartridge shells 122 , 132 , can be removed from a filter system housing 110 by the method of first removing a cap 160 from the housing 110 . This may include removing bolts 161 or any other fastener used to secure the cap 160 to the housing 110 .
  • the filter cartridge 120 , 130 can be removed from the interior 112 of the housing 110 .
  • a cover or multiple covers 218 as those shown in FIG. 2 , can be removed from the end or ends of the filter cartridge 200 .
  • This may include removing screws 262 that secure the cover 218 to walls 212 , 214 of the shell 210 and, in some embodiments, may include removing a compression pad 230 .
  • both covers can be removed, and the inner wall 212 , filter section 220 and outer wall 214 can be separated from each other.
  • one cover 218 may be removed and the filter section 220 can be removed from between the walls 212 , 214 by any means including lifting, sliding, pouring, detaching, and the like.
  • the filter section 220 can be removed by any means including lifting, sliding, pouring, detaching, and the like.
  • the filter section 220 may be removed with respect to the cartridge shell 210 .
  • the filter section 220 can then be replaced with another filter section 220 with similar or different filtering properties.
  • a filter section containing one type of carbon may be replaced by a filter section containing another type of carbon.
  • the new filter section 220 can be placed within the filter cartridge shell 210 .
  • any cover 218 or screw 262 that had been removed can be returned to their former disposition.
  • the filter cartridge 120 , 130 can then be returned to the housing 110 to form a refurbished radial filter system 100 .
  • FIG. 3 shows an exploded view of a filter cartridge shell 310 similar to the filter cartridge shell 210 shown in FIG. 2 .
  • Filter media disposed between inner wall 312 and outer wall 314 can be compressed with compression gasket 330 .
  • One or more gaskets 340 can fit into one or more gasket grooves 319 in cartridge covers 318 to seal one or more cartridge covers, 318 to one or more end caps 160 as shown in FIG. 1 .
  • filter sections 420 , 440 , 460 not enclosed by filter cartridge shells can also be removed and replaced, e.g., by removing a cap 414 from the housing 410 , removing the filter section 420 , 440 , 460 and replacing it with another filter section 420 , 440 , 460 with similar or different filtration properties.
  • a filter section containing a carbon loaded web may be replaced with a filter section containing a zeolite loaded web.
  • filter cartridges 430 , 450 can also be removed from the housing 410 to enable easier replacement of the filter sections 420 , 440 , 460 .
  • FIG. 4 shows an exploded assembly view of an exemplary radial flow filtration system 400 including a combination of filter sections 420 , 440 , 460 provided without cartridges and filter cartridges 430 , 450 .
  • FIG. 5 shows a section view of the same radial flow filtration system 400 .
  • the housing 410 may include an inner protective screen 419 , an outer protective screen 418 , a cap 414 disposed on each end of the protective screens, and two concentric gaskets 412 attached to each cap 414 on the exterior of the housing 410 .
  • the housing 410 may have only one removable cap 414 .
  • Bolts 416 may be used to secure the housing end caps 414 .
  • the height of the housing can be approximately 23 to 25 centimeters and the outer diameter can be approximately 50 to 55 centimeters. Housing dimensions can be adjusted to meet the needs of any desired filter application.
  • the filter system 400 includes five filter sections: two filter sections 432 , 452 enclosed in filter cartridges 430 , 450 , having covers 436 , 456 further enclosed in the housing 410 .
  • Filter cartridge covers 436 , 456 can be sealed to end caps 414 by gaskets 470 .
  • Three filter sections 420 , 440 , 460 not enclosed by filter cartridge shells can be enclosed in the housing 410 .
  • the inlet 114 can be disposed at the inner circumference of the housing 410 and the outlet 116 can be disposed at the outer circumference of the housing 410 .
  • the first filter cartridge 430 includes a first filter cartridge shell 434 and a first filter section 432 , which, in an exemplary embodiment, includes a chemical filtering medium.
  • the first filter cartridge 430 may be similar to the embodiment shown in FIG. 2 .
  • the first filter cartridge shell 434 may include inner and outer walls (shown, e.g., in FIG. 2 as 212 , 214 ), which may be formed of perforated metal sheets such as aluminum or steel sheets or engineered plastics.
  • the first filter cartridge shell may have a cover 436 at each end of the walls with an opening in the center of the cover.
  • the covers 436 may be generally ring shaped. The covers can be secured to the walls by screws 462 , or alternatively, by another type of fastener.
  • Granular 12 ⁇ 30 mesh activated carbon may be loaded into the cartridge shell.
  • any other type of chemical filtering element may be used.
  • Spunbonded layers may also be adhesively fixed to the cylinders on the sides facing the carbon to prevent carbon from leaking out through perforations in the walls.
  • the second filter cartridge 450 may include a second cartridge shell 454 , having walls such as those shown in FIGS. 1-3 and at least one second cover 456 , and a second filter section 452 .
  • the second cartridge shell 454 may have a structure similar to the first cartridge shell 434 .
  • Granular zeolite with a 40 ⁇ 140 mesh size may be loaded into the cartridge shell 454 using a snowstorm filling method. Alternatively, other types of zeolite or other chemical filtering sections may be used. Spunbonded layers are adhesively fixed to the cylinders at the side facing the granular zeolite.
  • the third filter section 420 includes, in this embodiment, a combination of a particulate and a chemical filtering media.
  • the filter section 420 may include one or more wraps of particle loaded web, and it may be disposed around the outer perimeter of the first filter cartridge 430 .
  • the web may consist of a fibrous structure into which fine mesh carbon has been applied, for example 40 ⁇ 140 mesh, or coarser or finer such as described in United States Published Application No. 2006/0096911 A1.
  • the carbon may consist of URC treated with TEDA as described in U.S. Pat. No. 6,767,860.
  • the fourth filter section 440 may include, in this embodiment, a combination of particulate and chemical filtering medium.
  • the filter section 440 may include one or more wraps of particle loaded web and it may be disposed around the outer perimeter of the second filter cartridge 440 .
  • An exemplary web may consist of a fibrous structure into which a fine mesh zeolite has been applied, for example 40 ⁇ 140 mesh, or coarser or finer.
  • any other type of chemical filtering medium may be used in the fourth filter section.
  • the fifth filter section 460 may be disposed nearest to the inlet 114 .
  • This section 460 can include a particulate filtering medium, which may be provided in a pleated configuration and configured to target particulate contaminants. Use of a pleated medium increases surface area available for contaminant loading.
  • the fifth filter section may comprise non pleated medium.
  • the first filter section 460 may be formed from a filtering medium able to deliver capture efficiencies exceeding 99.99% of particles extending into the submicron size range. Examples of such media include membranes such as an expanded polytetrafluoroethylene (PTFE) membrane.
  • PTFE expanded polytetrafluoroethylene
  • FIG. 6 shows schematically an exemplary air handling system 600 including a radial flow filter system 610 consistent with the present disclosure.
  • An exemplary air handling system includes a motor assembly 620 that drives a fan 630 .
  • the inlet 612 of the system may be located at the suction side of the fan 630 . Air is pulled by the fan 630 through the inlet 612 and into the filter system 610 . After passing through the filter system 610 , the air exits the air handling system through the outlet 614 , which is in fluid communication with the outer periphery of the radial flow filtration system 610 .
  • Any exemplary filtration system described above may be used as the radial flow filter system 610 .
  • the system 600 illustrated is portable and may be used in stationary or mobile applications. Alternatively, a radial flow filtration system consistent with the present disclosure could be used in permanent air handling systems, or in any other fluid filtration application.
  • a radial flow filtration system of the present disclosure can include any suitable number and combination of filter cartridges including filter sections, and filter sections without cartridge shells.
  • a filter system may include at least one and as many as five or more filter cartridges that are removable with respect to the housing and include filter sections that are removable with respect to the filter cartridge shell.
  • the filter system may additionally include any desired number and combination of filter sections without cartridge shells to meet the needs of a given application and any other suitable components in addition to those exemplified.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
US13/140,064 2008-12-22 2009-12-04 Refillable filter system Active 2032-10-17 US9259676B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/140,064 US9259676B2 (en) 2008-12-22 2009-12-04 Refillable filter system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US13976008P 2008-12-22 2008-12-22
US13/140,064 US9259676B2 (en) 2008-12-22 2009-12-04 Refillable filter system
PCT/US2009/066698 WO2010074922A1 (en) 2008-12-22 2009-12-04 Refillable filter system

Publications (2)

Publication Number Publication Date
US20110311400A1 US20110311400A1 (en) 2011-12-22
US9259676B2 true US9259676B2 (en) 2016-02-16

Family

ID=42288069

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/140,064 Active 2032-10-17 US9259676B2 (en) 2008-12-22 2009-12-04 Refillable filter system

Country Status (6)

Country Link
US (1) US9259676B2 (de)
EP (1) EP2373393B1 (de)
CA (1) CA2747907C (de)
ES (1) ES2495343T3 (de)
PL (1) PL2373393T3 (de)
WO (1) WO2010074922A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8828112B2 (en) * 2010-09-07 2014-09-09 Hdt Expeditionary Systems, Inc. Air filter
US8864864B2 (en) * 2012-12-03 2014-10-21 Ye Siang Enterprise Co., Ltd. Circular cylinder air filter
DE102021128689A1 (de) * 2021-11-04 2023-05-04 Mann+Hummel Gmbh Rundfilterelement zur Filtration eines gasförmigen Fluids
DE102023102883A1 (de) * 2023-02-07 2024-08-08 Mann+Hummel Gmbh Filterelement mit wenigstens zwei Filtermediumkörpern

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838901A (en) 1988-05-17 1989-06-13 Life Systems, Inc. Lightweight filter
US5328609A (en) 1992-11-16 1994-07-12 Magnusson Jon H Multi-stage radial flow filtration system
WO1997022394A1 (en) 1995-12-20 1997-06-26 Baldwin Filters, Inc. Environmentally friendly filter cartridge
US5772713A (en) * 1996-05-30 1998-06-30 Salinas; Irma C. Adjustable filter assembly
US6093237A (en) 1998-06-04 2000-07-25 Donaldson Company, Inc. Stack filter assembly and methods
US6152996A (en) * 1997-03-05 2000-11-28 Air-Maze Corporation Air cleaner element having incorporated sorption element
US6391429B1 (en) 1995-12-07 2002-05-21 3M Innovative Properties Company Permeable shaped structures of active particulate bonded with PSA polymer microparticulate
US6409919B1 (en) 2001-01-23 2002-06-25 North American Filter Corporation Reusable filter housing with replaceable, disposable filter cartridge
US20030041572A1 (en) 2001-08-28 2003-03-06 Thermo Forma Inc. Incubator having combined HEPA and VOC filter
US6767860B2 (en) 2001-05-10 2004-07-27 3M Innovative Properties Company Sublimation of solid organic compounds onto substrate surfaces in the presence of a fluid impregnant
KR20040107953A (ko) 2003-06-16 2004-12-23 삼성전자주식회사 공기 여과 장치
US20060096911A1 (en) 2004-11-08 2006-05-11 Brey Larry A Particle-containing fibrous web
US7081201B2 (en) 2002-04-19 2006-07-25 3M Innovative Properties Company Encapsulated filter cartridge
US20060207232A1 (en) * 2005-03-17 2006-09-21 Samsung Electronics Co., Ltd. Chemical filter and fan filter unit having the same
US7279091B2 (en) 2001-02-08 2007-10-09 Hydac Filtertechnik Gmbh. Filter device
US20070241045A1 (en) 2006-04-17 2007-10-18 Kott Leonard B Replaceable tandem filter cartridge assembly
US7481234B1 (en) * 2003-03-27 2009-01-27 Gustafson Martin K Bio-hazard attack family survival dome

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344626A (en) 1992-06-26 1994-09-06 Minnesota Mining And Manufacturing Company Dual impregnated activated carbon
DE4342406C2 (de) * 1993-12-13 1998-02-05 Knecht Filterwerke Gmbh Ölabscheider

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838901A (en) 1988-05-17 1989-06-13 Life Systems, Inc. Lightweight filter
US5328609A (en) 1992-11-16 1994-07-12 Magnusson Jon H Multi-stage radial flow filtration system
US6391429B1 (en) 1995-12-07 2002-05-21 3M Innovative Properties Company Permeable shaped structures of active particulate bonded with PSA polymer microparticulate
WO1997022394A1 (en) 1995-12-20 1997-06-26 Baldwin Filters, Inc. Environmentally friendly filter cartridge
US5772713A (en) * 1996-05-30 1998-06-30 Salinas; Irma C. Adjustable filter assembly
US6152996A (en) * 1997-03-05 2000-11-28 Air-Maze Corporation Air cleaner element having incorporated sorption element
US6093237A (en) 1998-06-04 2000-07-25 Donaldson Company, Inc. Stack filter assembly and methods
US6409919B1 (en) 2001-01-23 2002-06-25 North American Filter Corporation Reusable filter housing with replaceable, disposable filter cartridge
US7279091B2 (en) 2001-02-08 2007-10-09 Hydac Filtertechnik Gmbh. Filter device
US6767860B2 (en) 2001-05-10 2004-07-27 3M Innovative Properties Company Sublimation of solid organic compounds onto substrate surfaces in the presence of a fluid impregnant
US20030041572A1 (en) 2001-08-28 2003-03-06 Thermo Forma Inc. Incubator having combined HEPA and VOC filter
US7081201B2 (en) 2002-04-19 2006-07-25 3M Innovative Properties Company Encapsulated filter cartridge
US7481234B1 (en) * 2003-03-27 2009-01-27 Gustafson Martin K Bio-hazard attack family survival dome
KR20040107953A (ko) 2003-06-16 2004-12-23 삼성전자주식회사 공기 여과 장치
US20060096911A1 (en) 2004-11-08 2006-05-11 Brey Larry A Particle-containing fibrous web
US20060207232A1 (en) * 2005-03-17 2006-09-21 Samsung Electronics Co., Ltd. Chemical filter and fan filter unit having the same
US7320721B2 (en) 2005-03-17 2008-01-22 Samsung Electronics Co., Ltd. Chemical filter and fan filter unit having the same
US20070241045A1 (en) 2006-04-17 2007-10-18 Kott Leonard B Replaceable tandem filter cartridge assembly

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Supplemental European Search Report for European Patent Application No. 09835490.5-1213, dated May 3, 2012.
Technical Report NW002566, "CBR/TIC filter Design and Evaluation", report NW002566, New World Associates, Inc., Van Doren et al, Dec. 2006.

Also Published As

Publication number Publication date
US20110311400A1 (en) 2011-12-22
CA2747907C (en) 2017-12-12
EP2373393A4 (de) 2012-05-30
WO2010074922A1 (en) 2010-07-01
CA2747907A1 (en) 2010-07-01
EP2373393A1 (de) 2011-10-12
ES2495343T3 (es) 2014-09-17
EP2373393B1 (de) 2014-06-25
PL2373393T3 (pl) 2014-10-31

Similar Documents

Publication Publication Date Title
US6152996A (en) Air cleaner element having incorporated sorption element
US4559066A (en) Filters for purification of gases
EP0504389B1 (de) Zusammengesetzte gasfiltereinheit
US4322230A (en) Unitized gas-particulate filter and housing
US8821619B2 (en) Adsorbent cartridge assembly with end cap
US12274969B2 (en) Vehicle cabin filter assembly
US4969936A (en) Filtration apparatus
CA2747782A1 (en) Compact multigas filter
JP2002516738A (ja) スタックフィルタアッセンブリおよび方法
US7632325B2 (en) Filter assembly
US9259676B2 (en) Refillable filter system
US20210276401A1 (en) Vehicle cabin filter assembly
CN107847773A (zh) 用于呼吸面罩的滤筒和呼吸面罩
US20110146490A1 (en) Air filter with extended life
KR20000076521A (ko) 유체와 기체용 여과장치 및 카트리지
JPS6111061A (ja) 濾過器キヤニスタ
JP3171920U (ja) 粉塵除去フィルタ
CN217431301U (zh) 用于从气流中分离油蒸气的过滤器元件和过滤器装置
CN104822435A (zh) 防止层状净化床装置中微粒与粉尘游移的设备
GB2488264A (en) Apparatus and system for filtering air
RU2610609C1 (ru) Устройство для очистки газов
US20170197172A1 (en) Filter assembly
KR101929023B1 (ko) 다층 구조의 정제함
KR102382831B1 (ko) 레이저 가공용 탈취 집진기
GB2575323A (en) Vehicle cabin filter assembly

Legal Events

Date Code Title Description
AS Assignment

Owner name: 3M INNOVATIVE PROPERTIES COMPANY, MINNESOTA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BILLINGSLEY, BRITTON G.;CASTIGLIONE, DAVID M.;DWYER, GARY E.;AND OTHERS;SIGNING DATES FROM 20110831 TO 20110909;REEL/FRAME:026891/0330

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8